초록 ▼

The invention provides a network device control apparatus which can set an IP address to be inherently set by using a general program while an erroneous setup of the IP address by the general program is avoided. In the network device control apparatus according to the invention, data is received fro

The invention provides a network device control apparatus which can set an IP address to be inherently set by using a general program while an erroneous setup of the IP address by the general program is avoided. In the network device control apparatus according to the invention, data is received from a network by using a standard protocol, a special attribute value is detected in the standard protocol with respect to the data, and when a destination physical address of the data is the same as its own physical address, various parameters are set in accordance with the attribute value.

대표청구항 ▼

What is claimed is: 1. A network apparatus comprising: a receiving unit for receiving data from a network; a detecting unit for detecting a value indicative of a data length, the value being in a packet header of the data received by said receiving unit, the packet header being provided for a prede

What is claimed is: 1. A network apparatus comprising: a receiving unit for receiving data from a network; a detecting unit for detecting a value indicative of a data length, the value being in a packet header of the data received by said receiving unit, the packet header being provided for a predetermined protocol; and a setting unit for setting a logic address of said network apparatus based on a destination logic address of the received data so that the logic address of said network apparatus and the destination logic address of the received data are the same in a case where the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received data, and a destination physical address of the received data and a physical address of said network apparatus are the same. 2. An apparatus according to claim 1, wherein, in a case where the destination logic address of the received data and the logic address of said network apparatus differ, the destination physical address of the received data and the physical address of said network apparatus are the same, and the detected value indicative of the data length is the specific value, said setting unit sets the destination logic address of the received data as the logic address of said network apparatus. 3. An apparatus according to claim 1, wherein the physical address is a media access control address, and the logic address is an Internet protocol address. 4. An apparatus according to claim 3, wherein the received data is an ICMP echo message by an ICMP protocol and the detected value indicates a data length of the ICMP echo message. 5. A network apparatus comprising: a receiving unit for receiving data from a network; a detecting unit for detecting a TTL value, the value being in a packet header of the data received by said receiving unit, the packet header being provided for a predetermined protocol, the TTL value being referred to by a router and reduced by the router when the router receives the data; and a setting unit for setting a logic address of said network apparatus based on a destination logic address of the received data so that the logic address of said network apparatus and the destination logic address of the received data are the same in a case where the detected TTL value is a specific TTL value, and a destination physical address of the received data and a physical address of said network apparatus are the same. 6. An apparatus according to claim 5, wherein the received data is an ICMP echo message by an ICMP protocol and the detected value indicates a data length of the ICMP echo message. 7. A network apparatus comprising: a receiving unit for receiving an ICMP echo message; a data length detecting unit for detecting a value indicative of a data length, the value being in a packet header of the ICMP echo message received by said receiving unit; and a setting unit for setting an IP address of said network apparatus based on a destination IP address of the received ICMP echo message so that the IP address of said network apparatus and the destination IP address of the received data are the same if the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received ICMP echo message, and a destination MAC address of the received ICMP echo message and a MAC address of said network apparatus are the same. 8. An apparatus according to claim 7, wherein if the destination IP address of the received ICMP echo message and the IP address of said network apparatus differ and the destination MAC address of the received ICMP echo message and the MAC address of said network apparatus are the same, said setting unit sets the IP address of said network apparatus in accordance with the detected value indicative of the data length. 9. A method of controlling a network device comprising: a receiving step, of receiving data from a network; a detecting step, of detecting a value indicative of a data length, the value being in a packet header of the received data, the packet header being provided for a predetermined protocol; and a setting step, of setting a logic address of said network apparatus based on a destination logic address of the received data so that the logic address of said network apparatus and the destination logic address of the received data are the same in a case where the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received data, and a destination physical address of the received data and a physical address of the network device are the same. 10. A method according to claim 9, wherein, in a case where the destination logic address of the received data and the logic address of said network apparatus differ, the destination physical address of the received data and the physical address of said network apparatus are the same, and the detected value indicative of the data length is the specific value, said setting step sets the destination logic address of the received data as the logic address of said network apparatus. 11. A method according to claim 9, wherein the received data is an ICMP echo message by an ICMP protocol and the detected value indicates a data length of the ICMP echo message. 12. A method of controlling a network device comprising: a receiving step, of receiving data from a network; a detecting step, of detecting a TTL value, the value being in a packet header of the received data, the packet header being provided for a predetermined protocol, the TTL value being referred to by a router and reduced by the router when the router receives the data; and a setting step, of setting a logic address of said network apparatus based on a destination logic address of the received data so that the logic addresses of said network apparatus and the destination logic address of the received data are the same in a case where the detected TTL value is a specific TTL value, and a destination physical address of the received data and a physical address of the network device are the same. 13. A method of controlling a network device comprising: a receiving step, of receiving an ICMP echo message; a data length detecting step, of detecting a value indicative of a data length, the value being in a packet header of the received ICMP echo message; and a setting step, of setting an IP address of said network apparatus based on a destination IP address of the received ICMP echo message so that the IP address of said network apparatus and the destination IP address of the received data are the same if the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received ICMP echo message, and a destination MAC address of the received ICMP echo message and a MAC address of the network device are the same. 14. A method according to claim 13, wherein in said setting step, if the destination IP address of the received ICMP echo message and the IP address of said network apparatus differ and the destination MAC address of the received ICMP echo message and the MAC address of said network apparatus are the same, the IP address of the network device is set in accordance with the detected data length. 15. A network apparatus comprising: a receiving unit for receiving data from a network; a detecting unit for detecting a value indicative of a data length, the value being in a packet header of the data received by said receiving unit, the packet header being provided for a predetermined protocol; and a setting unit for setting an address of said network apparatus based on a destination address of the received data so that the address of said network apparatus and the destination address of the received data are the same in a case where the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received data, and a destination physical address of the received data and a physical address of said network apparatus are the same. 16. An apparatus according to claim 15, wherein the address is an Internet protocol address. 17. A network apparatus comprising: a receiving unit for receiving data from a network; a detecting unit for detecting a value indicative of a data length, the value being in a packet header of the data received by said receiving unit, the packet header being provided for a predetermined protocol; and a setting unit for setting an address of said network apparatus based on a first destination address of the received data so that the address of said network apparatus and the first destination address of the received data are the same in a case where the detected value indicative of the data length is a specific value indicative of a specific data length different from actual data length of the received data, and a second destination address of the received data and an address unique to said network apparatus are the same, wherein the first and second destination address differ from each other.